664657785355 has 8 divisors (see below), whose sum is σ = 801102953232. Its totient is φ = 529383821088.

The previous prime is 664657785347. The next prime is 664657785359. The reversal of 664657785355 is 553587756466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 664657785355 - 2³ = 664657785347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664657785359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292799652 + ... + 292801921.

It is an arithmetic number, because the mean of its divisors is an integer number (100137869154).

Almost surely, 2^664657785355 is an apocalyptic number.

664657785355 is a deficient number, since it is larger than the sum of its proper divisors (136445167877).

664657785355 is a wasteful number, since it uses less digits than its factorization.

664657785355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585601805.

The product of its digits is 635040000, while the sum is 67.

The spelling of 664657785355 in words is "six hundred sixty-four billion, six hundred fifty-seven million, seven hundred eighty-five thousand, three hundred fifty-five".